De-icing mat with a pattern



FIG. 1 is a front view of a de-icing mat with pattern showing my new design;

FIG. 2 is a perspective front view thereof; and,

FIG. 3 is a left side view thereof.

The broken lines showing the remainder of the de-icing mat forms no part of the claimed design. 

CLAIM The ornamental design for a de-icing mat with pattern, as shown and described. 